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A Collider Signature of the Supersymmetric Golden Region

机译:超对称黄金地段的对撞机签名

摘要

Null results of experimental searches for the Higgs boson and thesuperpartners imply a certain amount of fine-tuning in the electroweak sectorof the Minimal Supersymmetric Standard Model (MSSM). The "golden region" in theMSSM parameter space is the region where the experimental constraints aresatisfied and the amount of fine-tuning is minimized. In this region, the stoptrilinear soft term is large, leading to a significant mass splitting betweenthe two stop mass eigenstates. As a result, the decay of the heavier stop intothe lighter stop and a Z boson is kinematically allowed throughout the goldenregion. We propose that the experiments at the Large Hadron Collider (LHC) cansearch for this decay through an inclusive signature, Z+2jb+missing Et+X. Weevaluate the Standard Model backgrounds for this channel, and identify a set ofcuts that would allow detection of the supersymmetric contribution at the LHCfor the MSSM parameters typical of the golden region. We also discuss otherpossible interpretations of a signal for new physics in the Z+2jb+missing Et+Xchannel, and suggest further measurements that could be used to distinguishamong these interpretations.
机译:对希格斯玻色子和超级伙伴的实验搜索的空结果表明,在最小超对称标准模型(MSSM)的电弱扇区中进行了一定量的微调。 MSSM参数空间中的“黄金区域”是满足实验约束且微调量最小化的区域。在该区域中,三重线性软项很大,导致两个大质量本征态之间发生明显的质量分裂。结果,较重的光阑衰减为较轻的光阑,并且在整个黄金区域中运动学上允许使用Z玻色子。我们建议大型强子对撞机(LHC)的实验可以通过包含性签名Z + 2jb + missing Et + X寻找这种衰变。我们评估了此通道的标准模型背景,并确定了一组切入点,这些切入点将允许在LHC处针对黄金区域典型的MSSM参数检测超对称贡献。我们还将讨论Z + 2jb +缺失Et + X通道中新物理信号的其他可能解释,并提出可用于区分这些解释的进一步测量方法。

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